| // general protection fault in propagate_entity_cfs_rq |
| // https://syzkaller.appspot.com/bug?id=88f8bce303b81a0f582e2e75b92f86f8df5b224c |
| // status:open |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <arpa/inet.h> |
| #include <endian.h> |
| #include <errno.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <linux/futex.h> |
| #include <linux/if.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_tun.h> |
| #include <linux/ip.h> |
| #include <linux/tcp.h> |
| #include <net/if_arp.h> |
| #include <pthread.h> |
| #include <sched.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <stdlib.h> |
| #include <sys/ioctl.h> |
| #include <sys/prctl.h> |
| #include <sys/resource.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/time.h> |
| #include <sys/uio.h> |
| #include <sys/wait.h> |
| #include <unistd.h> |
| |
| __attribute__((noreturn)) static void doexit(int status) |
| { |
| volatile unsigned i; |
| syscall(__NR_exit_group, status); |
| for (i = 0;; i++) { |
| } |
| } |
| #include <errno.h> |
| #include <stdarg.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| |
| const int kFailStatus = 67; |
| const int kRetryStatus = 69; |
| |
| static void fail(const char* msg, ...) |
| { |
| int e = errno; |
| va_list args; |
| va_start(args, msg); |
| vfprintf(stderr, msg, args); |
| va_end(args); |
| fprintf(stderr, " (errno %d)\n", e); |
| doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus); |
| } |
| |
| #define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1) |
| |
| #define BITMASK_LEN_OFF(type, bf_off, bf_len) \ |
| (type)(BITMASK_LEN(type, (bf_len)) << (bf_off)) |
| |
| #define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len) \ |
| if ((bf_off) == 0 && (bf_len) == 0) { \ |
| *(type*)(addr) = (type)(val); \ |
| } else { \ |
| type new_val = *(type*)(addr); \ |
| new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len)); \ |
| new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off); \ |
| *(type*)(addr) = new_val; \ |
| } |
| |
| static void use_temporary_dir() |
| { |
| char tmpdir_template[] = "./syzkaller.XXXXXX"; |
| char* tmpdir = mkdtemp(tmpdir_template); |
| if (!tmpdir) |
| fail("failed to mkdtemp"); |
| if (chmod(tmpdir, 0777)) |
| fail("failed to chmod"); |
| if (chdir(tmpdir)) |
| fail("failed to chdir"); |
| } |
| |
| static void vsnprintf_check(char* str, size_t size, const char* format, |
| va_list args) |
| { |
| int rv; |
| |
| rv = vsnprintf(str, size, format, args); |
| if (rv < 0) |
| fail("tun: snprintf failed"); |
| if ((size_t)rv >= size) |
| fail("tun: string '%s...' doesn't fit into buffer", str); |
| } |
| |
| #define COMMAND_MAX_LEN 128 |
| #define PATH_PREFIX \ |
| "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin " |
| #define PATH_PREFIX_LEN (sizeof(PATH_PREFIX) - 1) |
| |
| static void execute_command(bool panic, const char* format, ...) |
| { |
| va_list args; |
| char command[PATH_PREFIX_LEN + COMMAND_MAX_LEN]; |
| int rv; |
| |
| va_start(args, format); |
| memcpy(command, PATH_PREFIX, PATH_PREFIX_LEN); |
| vsnprintf_check(command + PATH_PREFIX_LEN, COMMAND_MAX_LEN, format, args); |
| va_end(args); |
| rv = system(command); |
| if (rv) { |
| if (panic) |
| fail("command '%s' failed: %d", &command[0], rv); |
| } |
| } |
| |
| #define DEV_IPV4 "172.20.20.%d" |
| #define DEV_IPV6 "fe80::%02hx" |
| #define DEV_MAC "aa:aa:aa:aa:aa:%02hx" |
| |
| static void snprintf_check(char* str, size_t size, const char* format, ...) |
| { |
| va_list args; |
| |
| va_start(args, format); |
| vsnprintf_check(str, size, format, args); |
| va_end(args); |
| } |
| |
| static void initialize_netdevices(void) |
| { |
| unsigned i; |
| const char* devtypes[] = {"ip6gretap", "bridge", "vcan", "bond", "team"}; |
| const char* devnames[] = {"lo", |
| "sit0", |
| "bridge0", |
| "vcan0", |
| "tunl0", |
| "gre0", |
| "gretap0", |
| "ip_vti0", |
| "ip6_vti0", |
| "ip6tnl0", |
| "ip6gre0", |
| "ip6gretap0", |
| "erspan0", |
| "bond0", |
| "veth0", |
| "veth1", |
| "team0", |
| "veth0_to_bridge", |
| "veth1_to_bridge", |
| "veth0_to_bond", |
| "veth1_to_bond", |
| "veth0_to_team", |
| "veth1_to_team"}; |
| const char* devmasters[] = {"bridge", "bond", "team"}; |
| |
| for (i = 0; i < sizeof(devtypes) / (sizeof(devtypes[0])); i++) |
| execute_command(0, "ip link add dev %s0 type %s", devtypes[i], devtypes[i]); |
| execute_command(0, "ip link add type veth"); |
| |
| for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) { |
| execute_command( |
| 0, "ip link add name %s_slave_0 type veth peer name veth0_to_%s", |
| devmasters[i], devmasters[i]); |
| execute_command( |
| 0, "ip link add name %s_slave_1 type veth peer name veth1_to_%s", |
| devmasters[i], devmasters[i]); |
| execute_command(0, "ip link set %s_slave_0 master %s0", devmasters[i], |
| devmasters[i]); |
| execute_command(0, "ip link set %s_slave_1 master %s0", devmasters[i], |
| devmasters[i]); |
| execute_command(0, "ip link set veth0_to_%s up", devmasters[i]); |
| execute_command(0, "ip link set veth1_to_%s up", devmasters[i]); |
| } |
| execute_command(0, "ip link set bridge_slave_0 up"); |
| execute_command(0, "ip link set bridge_slave_1 up"); |
| |
| for (i = 0; i < sizeof(devnames) / (sizeof(devnames[0])); i++) { |
| char addr[32]; |
| snprintf_check(addr, sizeof(addr), DEV_IPV4, i + 10); |
| execute_command(0, "ip -4 addr add %s/24 dev %s", addr, devnames[i]); |
| snprintf_check(addr, sizeof(addr), DEV_IPV6, i + 10); |
| execute_command(0, "ip -6 addr add %s/120 dev %s", addr, devnames[i]); |
| snprintf_check(addr, sizeof(addr), DEV_MAC, i + 10); |
| execute_command(0, "ip link set dev %s address %s", devnames[i], addr); |
| execute_command(0, "ip link set dev %s up", devnames[i]); |
| } |
| } |
| |
| static void loop(); |
| |
| static void sandbox_common() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| setsid(); |
| |
| struct rlimit rlim; |
| rlim.rlim_cur = rlim.rlim_max = 160 << 20; |
| setrlimit(RLIMIT_AS, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 8 << 20; |
| setrlimit(RLIMIT_MEMLOCK, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 136 << 20; |
| setrlimit(RLIMIT_FSIZE, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 1 << 20; |
| setrlimit(RLIMIT_STACK, &rlim); |
| rlim.rlim_cur = rlim.rlim_max = 0; |
| setrlimit(RLIMIT_CORE, &rlim); |
| |
| if (unshare(CLONE_NEWNS)) { |
| } |
| if (unshare(CLONE_NEWIPC)) { |
| } |
| if (unshare(0x02000000)) { |
| } |
| if (unshare(CLONE_NEWUTS)) { |
| } |
| if (unshare(CLONE_SYSVSEM)) { |
| } |
| } |
| |
| int wait_for_loop(int pid) |
| { |
| if (pid < 0) |
| fail("sandbox fork failed"); |
| int status = 0; |
| while (waitpid(-1, &status, __WALL) != pid) { |
| } |
| return WEXITSTATUS(status); |
| } |
| |
| static int do_sandbox_none(void) |
| { |
| if (unshare(CLONE_NEWPID)) { |
| } |
| int pid = fork(); |
| if (pid != 0) |
| return wait_for_loop(pid); |
| |
| sandbox_common(); |
| if (unshare(CLONE_NEWNET)) { |
| } |
| initialize_netdevices(); |
| loop(); |
| doexit(1); |
| } |
| |
| struct thread_t { |
| int created, running, call; |
| pthread_t th; |
| }; |
| |
| static struct thread_t threads[16]; |
| static void execute_call(int call); |
| static int running; |
| static int collide; |
| |
| static void* thr(void* arg) |
| { |
| struct thread_t* th = (struct thread_t*)arg; |
| for (;;) { |
| while (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) |
| syscall(SYS_futex, &th->running, FUTEX_WAIT, 0, 0); |
| execute_call(th->call); |
| __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); |
| __atomic_store_n(&th->running, 0, __ATOMIC_RELEASE); |
| syscall(SYS_futex, &th->running, FUTEX_WAKE); |
| } |
| return 0; |
| } |
| |
| static void execute(int num_calls) |
| { |
| int call, thread; |
| running = 0; |
| for (call = 0; call < num_calls; call++) { |
| for (thread = 0; thread < sizeof(threads) / sizeof(threads[0]); thread++) { |
| struct thread_t* th = &threads[thread]; |
| if (!th->created) { |
| th->created = 1; |
| pthread_attr_t attr; |
| pthread_attr_init(&attr); |
| pthread_attr_setstacksize(&attr, 128 << 10); |
| pthread_create(&th->th, &attr, thr, th); |
| } |
| if (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) { |
| th->call = call; |
| __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); |
| __atomic_store_n(&th->running, 1, __ATOMIC_RELEASE); |
| syscall(SYS_futex, &th->running, FUTEX_WAKE); |
| if (collide && call % 2) |
| break; |
| struct timespec ts; |
| ts.tv_sec = 0; |
| ts.tv_nsec = 20 * 1000 * 1000; |
| syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts); |
| if (__atomic_load_n(&running, __ATOMIC_RELAXED)) |
| usleep((call == num_calls - 1) ? 10000 : 1000); |
| break; |
| } |
| } |
| } |
| } |
| |
| uint64_t r[1] = {0xffffffffffffffff}; |
| void execute_call(int call) |
| { |
| long res; |
| switch (call) { |
| case 0: |
| *(uint64_t*)0x20000740 = 0x20000040; |
| *(uint16_t*)0x20000040 = 2; |
| *(uint16_t*)0x20000042 = htobe16(0); |
| *(uint32_t*)0x20000044 = htobe32(0xe0000002); |
| *(uint8_t*)0x20000048 = 0; |
| *(uint8_t*)0x20000049 = 0; |
| *(uint8_t*)0x2000004a = 0; |
| *(uint8_t*)0x2000004b = 0; |
| *(uint8_t*)0x2000004c = 0; |
| *(uint8_t*)0x2000004d = 0; |
| *(uint8_t*)0x2000004e = 0; |
| *(uint8_t*)0x2000004f = 0; |
| *(uint32_t*)0x20000748 = 0x80; |
| *(uint64_t*)0x20000750 = 0x20000200; |
| *(uint64_t*)0x20000758 = 0; |
| *(uint64_t*)0x20000760 = 0x20000140; |
| memcpy((void*)0x20000140, "\x20\x00\x00\x00\x4a\xf2\xf9\x0d\x54\x4f\x25\x66" |
| "\xff\xc7\xe5\x1a\xbb\xe8\xb0\x9f\x77\xae\x51\xbc" |
| "\x86", |
| 25); |
| *(uint64_t*)0x20000768 = 0x19; |
| *(uint32_t*)0x20000770 = 0; |
| syscall(__NR_sendmsg, -1, 0x20000740, 0); |
| break; |
| case 1: |
| res = syscall(__NR_socket, 0x11, 3, 0); |
| if (res != -1) |
| r[0] = res; |
| break; |
| case 2: |
| *(uint64_t*)0x20000340 = 0; |
| *(uint32_t*)0x20000348 = 0; |
| *(uint64_t*)0x20000350 = 0x20000040; |
| *(uint64_t*)0x20000040 = 0x20000140; |
| *(uint64_t*)0x20000048 = 0; |
| *(uint64_t*)0x20000358 = 1; |
| *(uint64_t*)0x20000360 = 0; |
| *(uint64_t*)0x20000368 = 0; |
| *(uint32_t*)0x20000370 = 0; |
| syscall(__NR_sendmsg, -1, 0x20000340, 0); |
| break; |
| case 3: |
| *(uint64_t*)0x20000380 = 0x20000140; |
| *(uint16_t*)0x20000140 = 4; |
| *(uint16_t*)0x20000142 = htobe16(1); |
| *(uint32_t*)0x20000144 = htobe32(0); |
| memcpy((void*)0x20000148, "\x09\x50\xfe\x4a\xdb\xa7", 6); |
| *(uint8_t*)0x2000014e = 0; |
| *(uint8_t*)0x2000014f = 0; |
| *(uint32_t*)0x20000388 = 0x80; |
| *(uint64_t*)0x20000390 = 0x20000000; |
| *(uint64_t*)0x20000398 = 0; |
| *(uint64_t*)0x200003a0 = 0x20000240; |
| *(uint64_t*)0x200003a8 = 0; |
| *(uint32_t*)0x200003b0 = 0; |
| syscall(__NR_sendmsg, -1, 0x20000380, 0); |
| break; |
| case 4: |
| *(uint32_t*)0x20000080 = -1; |
| syscall(__NR_setsockopt, r[0], 0x107, 0xf, 0x20000080, 0x1ce); |
| break; |
| case 5: |
| *(uint64_t*)0x20000480 = 0x200000c0; |
| *(uint16_t*)0x200000c0 = 4; |
| *(uint16_t*)0x200000c2 = htobe16(0x894f); |
| *(uint32_t*)0x200000c4 = 5; |
| *(uint8_t*)0x200000c8 = 0xfe; |
| *(uint8_t*)0x200000c9 = 0x80; |
| *(uint8_t*)0x200000ca = 0; |
| *(uint8_t*)0x200000cb = 0; |
| *(uint8_t*)0x200000cc = 0; |
| *(uint8_t*)0x200000cd = 0; |
| *(uint8_t*)0x200000ce = 0; |
| *(uint8_t*)0x200000cf = 0; |
| *(uint8_t*)0x200000d0 = 0; |
| *(uint8_t*)0x200000d1 = 0; |
| *(uint8_t*)0x200000d2 = 0; |
| *(uint8_t*)0x200000d3 = 0; |
| *(uint8_t*)0x200000d4 = 0; |
| *(uint8_t*)0x200000d5 = 0; |
| *(uint8_t*)0x200000d6 = 0; |
| *(uint8_t*)0x200000d7 = 0; |
| *(uint32_t*)0x200000d8 = 0; |
| *(uint32_t*)0x20000488 = 0x80; |
| *(uint64_t*)0x20000490 = 0x20000340; |
| *(uint64_t*)0x20000498 = 0x25d; |
| *(uint64_t*)0x200004a0 = 0x20000380; |
| *(uint64_t*)0x200004a8 = 0; |
| *(uint32_t*)0x200004b0 = 0; |
| syscall(__NR_sendmsg, r[0], 0x20000480, 0); |
| break; |
| case 6: |
| *(uint32_t*)0x20000140 = 2; |
| *(uint32_t*)0x20000144 = 0x70; |
| *(uint8_t*)0x20000148 = 0; |
| *(uint8_t*)0x20000149 = -1; |
| *(uint8_t*)0x2000014a = 4; |
| *(uint8_t*)0x2000014b = 0x38; |
| *(uint32_t*)0x2000014c = 0; |
| *(uint64_t*)0x20000150 = 9; |
| *(uint64_t*)0x20000158 = 0x40000; |
| *(uint64_t*)0x20000160 = 8; |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0x101, 0, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 2, 1, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 7, 2, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0x200, 3, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0x100000001, 4, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 7, 5, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0, 6, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 5, 7, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 4, 8, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 4, 9, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 3, 10, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0xb84, 11, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 8, 12, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0x8000, 13, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0x2ef, 14, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0x212, 15, 2); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 2, 17, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 4, 18, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0xffff, 19, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 5, 20, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 4, 21, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 7, 22, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 5, 23, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0x601d, 24, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0x100000001, 25, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0x93fa, 26, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 4, 27, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0x80000001, 28, 1); |
| STORE_BY_BITMASK(uint64_t, 0x20000168, 0, 29, 35); |
| *(uint32_t*)0x20000170 = 7; |
| *(uint32_t*)0x20000174 = 4; |
| *(uint64_t*)0x20000178 = 9; |
| *(uint64_t*)0x20000180 = 3; |
| *(uint64_t*)0x20000188 = 0x802; |
| *(uint64_t*)0x20000190 = 0x400; |
| *(uint32_t*)0x20000198 = 6; |
| *(uint32_t*)0x2000019c = 6; |
| *(uint64_t*)0x200001a0 = 0; |
| *(uint32_t*)0x200001a8 = 7; |
| *(uint16_t*)0x200001ac = 0x338; |
| *(uint16_t*)0x200001ae = 0; |
| syscall(__NR_perf_event_open, 0x20000140, -1, 4, 0xffffff9c, 4); |
| break; |
| } |
| } |
| |
| void loop() |
| { |
| execute(7); |
| collide = 1; |
| execute(7); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| use_temporary_dir(); |
| do_sandbox_none(); |
| return 0; |
| } |
